! general configuration LOND
interface ixp_21
 ip address 180.21.0.19/24
exit

router ospf
  network 180.21.0.0/24 area 0
exit

router bgp 19
 bgp router-id 180.21.0.19
 no bgp ebgp-requires-policy
 no bgp network import-check

 neighbor 180.21.0.21 remote-as 21

 address-family ipv4 unicast
  neighbor 180.21.0.21 activate
  neighbor 180.21.0.21 soft-reconfiguration inbound

  network 19.0.1.0/24
  network 19.0.2.0/24
  network 19.0.3.0/24
  network 19.0.4.0/24
 exit-address-family
exit

access-list ixp permit any 

route-map IXP_EXPORT permit 10
  set community 21:1
exit

route-map IXP_IMPORT permit 10
  match ip address any
exit




! general config ALL
router bgp 19
 no bgp ebgp-requires-policy
 no bgp network import-check

 neighbor LOND peer-group
 neighbor 19.0.1.1 peer-group LOND
 neighbor 19.0.2.2 peer-group LOND

 neighbor BUCH peer-group
 neighbor 19.0.3.2 peer-group BUCH
 neighbor 19.0.4.1 peer-group BUCH

 neighbor BERL peer-group
 neighbor 19.0.4.2 peer-group BERL
 neighbor 19.0.2.1 peer-group BERL

 neighbor PARI peer-group
 neighbor 19.0.3.1 peer-group PARI
 neighbor 19.0.1.2 peer-group PARI

 neighbor LOND remote-as 19
 neighbor BUCH remote-as 19
 neighbor BERL remote-as 19
 neighbor PARI remote-as 19
exit